package edu.ua.Team_Industry;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Random;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;

import com.google.android.maps.GeoPoint;

public class DatabaseHelper extends SQLiteOpenHelper{
 
    //The Android's default system path of your application database.
    private static String DB_PATH = "/data/data/edu.ua.Team_Industry/databases/";
 
    private static String DB_NAME = "local.db";
    private static String TABLE_NAME = "PointTags";
 
    private SQLiteDatabase myDataBase; 
 
    private final Context myContext;
    Random id = new Random();
 
    /**
     * Constructor
     * Takes and keeps a reference of the passed context in order to access to the application assets and resources.
     * @param context
     */
    public DatabaseHelper(Context context) {
 
    	super(context, DB_NAME, null, 1);
        this.myContext = context;
    }	
 
  /**
     * Creates a empty database on the system and rewrites it with your own database.
     * */
    public void createDataBase() throws IOException{
 
    	boolean dbExist = checkDataBase();
 
    	if(dbExist){
    		//do nothing - database already exist
    	}else{
 
    		//By calling this method and empty database will be created into the default system path
               //of your application so we are gonna be able to overwrite that database with our database.
        	this.getReadableDatabase();
 
        	try {
 
    			copyDataBase();
 
    		} catch (IOException e) {
 
        		throw new Error("Error copying database");
 
        	}
    	}
 
    }
 
    /**
     * Check if the database already exist to avoid re-copying the file each time you open the application.
     * @return true if it exists, false if it doesn't
     */
    private boolean checkDataBase(){
 
    	SQLiteDatabase checkDB = null;
 
    	try{
    		String myPath = DB_PATH + DB_NAME;
    		checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
 
    	}catch(SQLiteException e){
 
    		//database does't exist yet.
 
    	}
 
    	if(checkDB != null){
 
    		checkDB.close();
 
    	}
 
    	return checkDB != null ? true : false;
    }
 
    /**
     * Copies your database from your local assets-folder to the just created empty database in the
     * system folder, from where it can be accessed and handled.
     * This is done by transfering bytestream.
     * */
    private void copyDataBase() throws IOException{
 
    	//Open your local db as the input stream
    	InputStream myInput = myContext.getAssets().open(DB_NAME);
 
    	// Path to the just created empty db
    	String outFileName = DB_PATH + DB_NAME;
 
    	//Open the empty db as the output stream
    	OutputStream myOutput = new FileOutputStream(outFileName);
 
    	//transfer bytes from the inputfile to the outputfile
    	byte[] buffer = new byte[1024];
    	int length;
    	while ((length = myInput.read(buffer))>0){
    		myOutput.write(buffer, 0, length);
    	}
 
    	//Close the streams
    	myOutput.flush();
    	myOutput.close();
    	myInput.close();
 
    }
 
    public void openDataBase() throws SQLException{
 
    	//Open the database
        String myPath = DB_PATH + DB_NAME;
    	myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
 
    }
 
    @Override
	public synchronized void close() {
 
    	    if(myDataBase != null)
    		    myDataBase.close();
 
    	    super.close();
 
	}
 
	@Override
	public void onCreate(SQLiteDatabase db) {
 
	}
 
	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 
	}
 
	public ArrayList<PointTag> getAllPointTags() {
Cursor c = myDataBase.query(TABLE_NAME, new String[] {"_id", "Description", "Latitude", "Longitude", "Color", "Date", "Picture"}, null, null, null, null, null);
		
		ArrayList<PointTag> tags = new ArrayList<PointTag>();
		
		if (c != null)
		{
			if (c.moveToFirst()) {
				do {
					PointTag pointTag = new PointTag(c.getInt(c.getColumnIndex("Latitude")), 
															c.getInt(c.getColumnIndex("Longitude")),
															c.getInt(c.getColumnIndex("Color")));
					pointTag.id = c.getInt(c.getColumnIndex("_id"));
					pointTag.description = c.getString(c.getColumnIndex("Description"));
					pointTag.picture = c.getString(c.getColumnIndex("Picture"));
					tags.add(pointTag);
				}while (c.moveToNext());
			}
		}
		
		return tags;
	}
	
	
	public ArrayList<PointTag> getPointTags(int Color) {
		Cursor c = myDataBase.query(TABLE_NAME, new String[] {"_id", "Description", "Latitude", "Longitude", "Color", "Date", "Picture"}, "Color = " + Color, null, null, null, null);
		
		ArrayList<PointTag> tags = new ArrayList<PointTag>();
		
		if (c != null)
		{
			if (c.moveToFirst()) {
				do {
					PointTag pointTag = new PointTag(c.getInt(c.getColumnIndex("Latitude")), 
															c.getInt(c.getColumnIndex("Longitude")),
															c.getInt(c.getColumnIndex("Color")));
					pointTag.id = c.getInt(c.getColumnIndex("_id"));
					pointTag.description = c.getString(c.getColumnIndex("Description"));
					pointTag.picture = c.getString(c.getColumnIndex("Picture"));
					tags.add(pointTag);
				}while (c.moveToNext());
			}
		}
		
		return tags;
	
	}
	
	public void addPointTag(PointTag tag) {
		ContentValues values = new ContentValues();
		values.put("_id", tag.id); 
		if (tag.description == null) 
			tag.description = "0";
		if (tag.picture == null) 
			tag.picture = "0";
		values.put("Description", tag.description);
		values.put("Latitude", tag.latitude);
		values.put("Longitude", tag.longitude);
		values.put("Color", tag.color);
		values.put("Date", "0");
		values.put("Picture", tag.picture);
		myDataBase.execSQL("INSERT OR REPLACE INTO " + TABLE_NAME + "(_id, Description, Latitude, Longitude, Color, Date, Picture)" +
							"VALUES (" + tag.id + ", '" + tag.description + "', " + tag.latitude + ", " + tag.longitude + ", " + tag.color + ", " + "'0'" + ", '" + tag.picture + "');");
		
	
	}
	
	public void addAreaTag(AreaTag tag) {
		
		ContentValues values = new ContentValues();
		values.put("color", tag.color);
		values.put("_id", tag.id);
		int i = 0;
		for (GeoPoint pt : tag.points) {
			values.put("Latitude", pt.getLatitudeE6());
			values.put("Longitude", pt.getLongitudeE6());
			values.put("tagOrder", i);
			
			myDataBase.execSQL("INSERT INTO AreaTags (color, _id, Latitude, Longitude, tagOrder)" +
					"VALUES (" + tag.color + ", " + tag.id + ", " + pt.getLatitudeE6() + ", " + pt.getLongitudeE6() + ", " + i + ");");
			
			i = i+1;
		}
	}
	
	public ArrayList<AreaTag> getAreaTags(int color) {

		Cursor c = myDataBase.query("AreaTags", new String[] {"color, _id", "Latitude", "Longitude", "tagOrder"}, "color = " + color, null, null, null, null);
		
		ArrayList<AreaTag> tags = new ArrayList<AreaTag>();
		
		
		if (c != null)
		{
			if (c.moveToFirst()) {
				do {
					boolean found = false;
					for (AreaTag tag : tags) {
						if (tag.id == (int) (c.getInt(c.getColumnIndex("_id")))) {
							found = true;
							tag.points.add(new GeoPoint(c.getInt(c.getColumnIndex("Latitude")), c.getInt(c.getColumnIndex("Longitude"))));
							//break;
						}
					}
					if (!found) {
						AreaTag areaTag = new AreaTag(c.getInt(c.getColumnIndex("_id")));
						areaTag.color = c.getInt(c.getColumnIndex("color"));
						areaTag.points.add(new GeoPoint(c.getInt(c.getColumnIndex("Latitude")), c.getInt(c.getColumnIndex("Longitude"))));
						tags.add(areaTag);
					}
					
				}while (c.moveToNext());
			}
		}
		
		return tags;
	}
	
	public ArrayList<AreaTag> getAllAreaTags() {

		Cursor c = myDataBase.query("AreaTags", new String[] {"color, _id", "Latitude", "Longitude", "tagOrder"}, null, null, null, null, null);
		
		ArrayList<AreaTag> tags = new ArrayList<AreaTag>();
		
		
		if (c != null)
		{
			if (c.moveToFirst()) {
				do {
					boolean found = false;
					for (AreaTag tag : tags) {
						if (tag.id == (int) (c.getInt(c.getColumnIndex("_id")))) {
							found = true;
							tag.points.add(new GeoPoint(c.getInt(c.getColumnIndex("Latitude")), c.getInt(c.getColumnIndex("Longitude"))));
							break;
						}
					}
					if (!found) {
						AreaTag areaTag = new AreaTag(c.getInt(c.getColumnIndex("_id")));
						areaTag.color = c.getInt(c.getColumnIndex("color"));
						areaTag.points.add(new GeoPoint(c.getInt(c.getColumnIndex("Latitude")), c.getInt(c.getColumnIndex("Longitude"))));
						tags.add(areaTag);
					}
					
				}while (c.moveToNext());
			}
		}
		
		return tags;
	}
	
	
	
	public void clearDb() {
		myDataBase.execSQL("DELETE FROM " + TABLE_NAME);
	}
 
}